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Finding the Fourth Proportional to 28,003,260.40, 42,004,890.60 and 28,003,260.40

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Solution

The fourth proportional to 28,003,260.40, 42,004,890.60 and 28,003,260.40 is: 42,004,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003,260.40 : 42,004,890.60 = 28,003,260.40 : x
  2. Step 2: Convert to fraction form
    28,003,260.40/42,004,890.60 = 28,003,260.40/x
  3. Step 3: Cross multiply
    28,003,260.40x = 42,004,890.60 × 28,003,260.40
  4. Step 4: Simplify right side
    28,003,260.40x = 1,176,273,889,545,312.25
  5. Step 5: Solve for x
    x = 1,176,273,889,545,312.25/28,003,260.40
  6. Step 6: Final answer
    x = 42,004,890.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.